Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
The Compound Pipe Calculator is designed to calculate one of the more challenging offsets
$1.99 · In-app purchases
Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Compound Offset Calculator: map the core Productivity workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
Hypothesis 1
Assumption to check: Limited user engagement
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Cluttered interface
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of customization options
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Poor rating due to bugs
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
The Compound Pipe Calculator is designed to calculate one of the more challenging offsets. A rolling offset that transitions into another offset/rolling offset. Total of 36 combinations of compound pipe offsets available in isometric view to match your drawing. Generates in seconds: -Accurate offset angles for angle1, the compound angle, angle3 -True cut length of pipe with root gap -Dimensions to cut Custom Fitting from a 90 - Input Feet/Inches/Fraction - Input Centimeters/Millimeters - Input Root Gap - Calculate "long radius", "short radius" and "3 Radius" fittings and custom fittings - Determines Cut Length of Pipe to build spool piece - Generates Values to cut any angle fitting out of a 90 - Generates Pipe Length and True Cut Length of Pipe Included are metric and imperial pipe charts. Thank you all for your support and your feedback is absolutely awesome. And always appreciated. I tweak these apps to be as simple and intuitive as possible. Everyone can message me at [email protected] with any question regarding all the pipe tools available if you would like assistance in seeing how powerful these tools can be. And I will answer you very quickly, in most cases within a few minutes of you sending a message. Video UserGuides on Youtube http://www.youtube.com/watch?v=44MbP0nRXnE Like us on Facebook http://www.facebook.com/PipefitterCalculator *** Immediate Fitter Support Beyond what's in the app*** *** New to fitting Pipe use the in-app feedback screen*** Also included is prompt customer service. You have a question, a comment, an issue or even a suggestion I am readily available. This is app is designed as a tool to improve your value in the workplace. Feedback is important.. if you see something occur please contact me with the feedback screen and I will contact you. I continually update when needed so everyone can use this app. Thank you.
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
From the Build Kit assessment.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.